# Stars on the HR Diagram

Plot star data to create an HR Diagram and use the diagram to discover information about the relationship between the temperature and brightness of stars.

Curriculum Topics: Star Properties, Luminosity, Scatter plot

### Standards

Idea Sheets are cross-referenced to subjects listed in the Common Core, Next Generation Science Standards, and California Content Standards.

Mathematical Practices: 1. Make sense of problems and persevere in solving them. 2. Reason abstractly and quantitatively. 3. Construct viable arguments and critique the reasoning of others. 4. Model with mathematics. 5. Use appropriate tools strategically. 6. Attend to precision. 7. Look for and make use of structure. 8. Look for and express regularity in repeated reasoning. ||Common Core Mathematics||Grade 7||Mathematical Practices|||Mathematical Practices: 1. Make sense of problems and persevere in solving them. 2. Reason abstractly and quantitatively. 3. Construct viable arguments and critique the reasoning of others. 4. Model with mathematics. 5. Use appropriate tools strategically. 6. Attend to precision. 7. Look for and make use of structure. 8. Look for and express regularity in repeated reasoning. ||Common Core Mathematics||Grade 8||Mathematical Practices|||8.SP.1. Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities. Describe patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association.||Common Core Mathematics||Grade 8||Statistics And Probability||Investigate Patterns Of Association In Bivariate Data|||Mathematical Practices: 1. Make sense of problems and persevere in solving them. 2. Reason abstractly and quantitatively. 3. Construct viable arguments and critique the reasoning of others. 4. Model with mathematics. 5. Use appropriate tools strategically. 6. Attend to precision. 7. Look for and make use of structure. 8. Look for and express regularity in repeated reasoning. ||Common Core Mathematics||High School||Mathematical Practices|||Communicate scientific ideas about the way stars, over their life cycle, produce elements. ||Next Generation Science Standards||High School||Earth and Space Science||Earth’s Place in the Universe |||HS.S.ID.1. Represent data with plots on the real number line (dot plots, histograms, and box plots).||Common Core Mathematics||High School||Interpreting Categorical And Quantitative Data||Summarize, Represent, And Interpret Data On A Single Count Or Measurement Variable|||HS.S.ID.6. Represent data on two quantitative variables on a scatter plot, and describe how the variables are related.||Common Core Mathematics||High School||Interpreting Categorical And Quantitative Data||Summarize, Represent, And Interpret Data On Two Categorical And Quantitative Variables

1.2 Represent two numerical variables on a scatterplot and informally describe how the data points are distributed and any apparent relationship that exists between the two variables (e.g., between time spent on homework and grade level).||CA Mathematics||Grade 7||04. Statistic, Data Analysis, and Probability||1.0 Students collect, organize, and represent data sets that have one or more variables and identify relationships among variables within a data set by hand and through the use of an electronic spreadsheet software program.|||4.b. The sun is one of many stars in our own Milky Way galaxy. Stars may differ in size, temperature, and color.||Grade 8||01. Physical Sciences||4. Earth in the Solar System||4. The structure and composition of the universe can be learned from the study of stars and galaxies, and their evolution.|||4.c. How to use astronomical units and light years as measures of distance between the sun, stars, and Earth.||Grade 8||01. Physical Sciences||4. Earth in the Solar System||4. The structure and composition of the universe can be learned from the study of stars and galaxies, and their evolution.

Categories include:
• Earth and Space Science
• Physical Science